GE Aerospace has completed the first test campaign for a high-speed, low-pressure turbine designed for CFM International’s RISE open-fan technology demonstrator. Testing began in 2025 and ran for more than 1,000 hours at the Polonia Aero laboratory in Zielonka, Poland. The work validated the turbine’s aerodynamic design and aerothermal performance; it did not involve a complete engine test or establish a commercial launch date.
A custom rig controlled airflow, temperature and pressure to reproduce a range of flight conditions. The low-pressure turbine is part of the RISE open-fan architecture, which removes the conventional fan casing to accommodate a larger fan. Data from the campaign will support further development ahead of flight tests planned for this decade.
RISE is a technology-demonstration programme jointly managed by GE Aerospace and Safran Aircraft Engines through CFM International, their 50-50 joint venture. Its target is fuel burn more than 20% below that of commercial engines currently in service; this is a programme objective, not a result demonstrated by the turbine tests. GE reported that RISE technologies had undergone about 500 test campaigns and more than 10,000 endurance and dust-ingestion cycles. Polonia Aero is operated by Avio Aero, a GE Aerospace company.